Are there any good resources for learning about First Nation's faiths online? Is there anyone here who was raised in/exposed to these faiths as a child?

I have been fortunate to have been invited to a number of First Nation's ceremonies, and have participated in sweats and healing circles. The ceremonies could best be described as pantheistic ancestor worship, but there were some stories about heroes and spirits. Being the only white guy was a trip, but it took a great deal of diplomacy in order to be accepted by the participants.